refactor AI system

src/lib/ecs/component/RallyBehavior.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <QVector2D>
+
+// Player combat ships loiter at the rally point until the departure timer
+// removes this component (ShipSystem::triggerRallyDeparture).
+struct RallyBehavior
+{
+    QVector2D rallyPoint;
+    float     score = 0.0f;
+};